Which versions of Parallels Desktop can be upgraded to version 12?

Only users with a valid license key, product key or activation key for Parallels Desktop version 10 or 11 are eligible for the $49.99 upgrade.   

If you have an older version of Parallels Desktop, you must purchase the full version to use Parallels Desktop 12.

To make a purchase, please visit the Parallels website directly: http://www.parallels.com